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Why is the -fast flag not the default for qtdeploy?

Edit: er, why the downvotes for a harmless question? I was curious why a flag named fast is not the default. This question is also very much related to the project page linked.

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qtdeploy is intended to be used for deploying and therefore will run qtrcc, qtmoc, qtminimal and do the actual bundling of your binary. the -fast flag re-uses the cached rcc_* moc_* minimal-* files and will also not re-run the actual bundling process. this works for the desktop targets but not for the mobile targets, therefore I made it optional.

In what world would "fast" mean "do things faster with no downsides"? ;)

It's a trade-off between deployment speed and quality, like compiler optimizations.

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